After about two weeks, I received an email to schedule the first technical interview. I was interviewed by a Quant Researcher from the London office. The interview included one LeetCode medium-level problem and two math questions.

4 rounds with a variety of researchers, mostly stats + ml questions, one or two brainteasers, black scholes, etc... etc.., make sure you revise ridge + lasso regression and weaknesses of different kinds of ML models